#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main() 
{
    int x, y, n;
    scanf("%d %d", &x, &y);
    int i = (100 * 100) / 2;
    int j = (x * y) / 2;
    int k = ((100 - x) * (100 - y)) / 2;
    int m = (100 - x) * y;
    if (x > y) 
    {
        n = i - j - k - m;
        printf("%d", n);
    }
    return 0;
}